s = input()
word_count = {}


def fact(n):
    if n == 0:
        return 1
    return n * fact(n -1)
    
    
for i in s:
    if i not in word_count:
        word_count[i] = 1
    
    else:
        word_count[i] += 1

cases = fact(len(s))

for i in word_count.values():
    cases //= fact(i)

print(cases)